Senior Ruby on Rails Developer

Network Finance; Randburg; On-site; ZAR 900,000 - 1,300,000; Full time

Job summary

Network Finance is seeking an experienced Senior Ruby on Rails Developer to own and advance key platform components across the full software lifecycle. You will collaborate with Product and Design to deliver scalable customer experiences, ship robust features, and improve system performance.

The role emphasizes hands-on development, architectural influence, and mentoring teammates while incorporating modern frontend and API technologies. Strong problem-solving and communication are essential.

Qualifications

• 6+ years of professional software development experience.
• Extensive experience with Ruby on Rails in production environments.
• Experience designing and maintaining APIs and integrations.
• Strong problem-solving and communication skills.

Responsibilities

• Design, develop, and maintain features across Ruby on Rails applications.
• Lead complex development initiatives from planning through deployment.
• Collaborate with Product and Design teams to deliver intuitive and scalable customer experiences.
• Build and maintain APIs and third-party integrations.
• Improve application performance, scalability, and reliability.
• Design and optimise data models for high-volume transactional environments.
• Write clean, maintainable, and well-tested code.
• Contribute to infrastructure, deployment pipelines, and developer tooling.
• Troubleshoot and resolve production issues while addressing root causes.
• Support the adoption and effective use of AI-assisted development practices.
• Mentor developers and contribute to engineering excellence across the team.

Skills

Ruby on Rails

REST APIs

GraphQL

PostgreSQL

Redis

Docker

CI/CD

AWS

Test automation

Mentoring

Software architecture

High-volume systems

Team leadership

TypeScript

AI workflows

Terraform

Education

Bachelor's degree in Computer Science or related

Tools

GitHub Actions

CircleCI

Terraform

AWS

Postman

Job description

An innovative technology organisation is seeking a Senior Ruby on Rails Developer to join its engineering team. This role is ideal for a passionate software engineer who enjoys owning complex technical challenges, contributing to architecture decisions, and building scalable products from concept through deployment.

The successful candidate will take ownership of key platform components, working closely with Product and Design teams to develop robust customer-facing solutions. You will be responsible for delivering high-quality software, improving system performance, and helping shape the technical direction of a growing platform.

This is a hands-on engineering role where you'll have the opportunity to contribute across the full software development lifecycle while mentoring fellow developers and driving best engineering practices.

Key Responsibilities

• Design, develop, and maintain features across Ruby on Rails applications.
• Lead complex development initiatives from planning through deployment.
• Collaborate with Product and Design teams to deliver intuitive and scalable customer experiences.
• Build and maintain APIs and third-party integrations.
• Improve application performance, scalability, and reliability.
• Design and optimise data models for high-volume transactional environments.
• Write clean, maintainable, and well-tested code.
• Contribute to infrastructure, deployment pipelines, and developer tooling.
• Troubleshoot and resolve production issues while addressing root causes.
• Support the adoption and effective use of AI-assisted development practices.
• Mentor developers and contribute to engineering excellence across the team.

Job Experience and Skills Required

• Relevant qualification in Computer Science, Software Engineering, Information Technology, or a related field.
• 6+ years of professional software development experience.
• Extensive experience with Ruby on Rails in production environments.
• Proven experience building scalable, customer-facing applications.
• Experience designing and maintaining APIs and integrations.
• Strong background in high-performance transaction-based systems.
• Experience mentoring developers and contributing to technical leadership initiatives.
• Ruby on Rails.
• Ruby development.
• PostgreSQL.
• REST and GraphQL APIs.
• Database design and optimisation.
• Redis.
• Sidekiq or equivalent background job processing frameworks.
• Asynchronous workflows and event-driven processing.
• Modern JavaScript and TypeScript.
• Automated testing and CI/CD practices.
• AWS cloud environments.
• Docker and containerisation.
• GitHub Actions, CircleCI, or similar deployment platforms.
• AI-powered product development.
• Large Language Model integrations and AI workflows.
• Workflow automation and intelligent systems.
• High-volume transactional platforms.
• Fintech or payment processing environments.
• Terraform and Infrastructure as Code.
• Performance profiling and optimisation expertise.
• Strong problem-solving and analytical abilities.
• Excellent communication and collaboration skills.
• Strong software architecture and design capabilities.
• Ability to balance scalability, performance, and maintainability.
• Product-focused mindset with strong customer awareness.
• Passion for mentoring and developing technical teams.
• Curiosity and enthusiasm for emerging technologies and AI.